Open-hearth-furnace door frame



June 16, 1925. 1,542,690

A. GANTZ OPEN HEARTH FURNACE DOOR FRAME Filed Aug. 11, 1923 3 Sheets:Sheet 1 0 15 o E MENTOR WITNESS: ATTORNEY June 16, 1925 1,542,690

A. GANTZ OPEN HEARTH FURNACE DOOR FRAME Filed Aug. 11, 1923 I5 Sheets-Sheet 2 8Q. m. WW

WITNESS ATTORNEY June 16, 1925. 1,542,690 A. GANTZ OPEN HEARTH FURNACE DOOR FRAME Filed Aug- 11, 1923 3 Sheets:Sheet 3 e. A I din dreur G a vz ii ATTORNEY Patented June 16, 1925.

PATENT o ANDREW GANTZ, OF YOUNGSTOWN, OHIO.

OPEN-HEABTH-FURNAGE DOOR 'FRAI E. 1

Application ma August 11, less. Serial in, 656,801.

To all whom it may concern:

Be it known that 1, ANDREW GANTZ, a

citizen of the Republic of Hungary, resid-.

ing at Youn stown, in the county of Mahoning and new and useful. Improvements in Open- Hearth-Furnace Door Frames, of which the following is a specification.

This invention relates to 'open hearth furnaces, articularly to the door frames there- ;of, an has for its object the provision of a novel frame of'hollow formation through which water is circulated for the purpose of effecting cooling, the essential feature of the invention being the provision of upstanding pedestals on the frame which support the iron work of the roof, the arrangement being such that an inspection may be made at any time to ascertain the conditions so that any defects may be discovered and remedied.

Another object is the provision of a structure of this character which is so constructed as not to be injured in case the roof is fpunched throughvby the loading machine which is commonly provided for effective charging of the furnace with the necessary materials.

A most important feature is the fprovision of a furnace structure and door rame arrangement in which the weight of the roof never comes upon the door frames so that they. will not ever bend out of shape as occurs so frequently in the ordinary type of furnace, it being well known thatsuch. bending and sagging leaves a hole which permits .a draft and causes the esca of gas.

Still another important 0 ject is the rovision of a furnace structure of such a 0 ar acter that whenever the top is raised for any reason the resultant opening between the top of a door frame and the top-struc- .ture ma be simply filled in with bricks.

Ali a ditional object is the provision of a frame of this character which, if preferred,

may be e uipped with a slidably mounted door whic can be kept closed ordinarily but which is readily capable of being opened whenever such is desired for any reason.

A further object is the provision of a structure vof this character which. will be simple and inexpensive to manufacture, easy toinstall, which will bedurable and efiicient in service art. v

With the above and other objects and adstate of Ohio, have invented form of frame,

practica and a general improvement in the vantages in viewthe invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in. which:

Figure 1 is a fragmentary elevation of an openhearth furnace showing one of my door frames mounted therein,

Figure 2 .isa,longitudinal section through the furnace looking at the door frame from the inside thereof,

Figure 3 is a cross section on the line 3-3 of Figure 1,

Figure 1 is a perspective View of one form of frame,

Figure 5 is a front elevation of another Figure'6 is a rear view thereof,

Figure 7 is a front elevation of another modification and Figure 8 is a rear view thereof.

Referring more particularly to the drawings and especially to Figure 4, I have shown the door frame as'constltuting an arch-like body'10 which is hollow and which includes a lower'or main portion defined by legs 11 located at opposite sides of an arched opening" 12. The to of the body portion is formed at its for I ard corners with upstanding hollow .pillars or pedestals 13, which,

however do not extend entirely to the rear face so as to leave a horizontal ledge 14.

Connected with the'bottom portion of the legs 11 are inlet pipes 15 for water'and connected with the tops of the pedestals 13 are outlet pipes 15. These pipes are provided 'erably greater, the pedestals 18 being correspondingly shorter. Furthermore the ledge pressed portion 19 which is substantially the v 17 is recessed out or formed with a desame hellght as the ledge 14 and which is of tween the pedestals 18.

In Figures 7 and 8 the structure 1s generally the same except that the arched o ning 20 is not of uniform size throng out y a length equal tothe distance bebut extends into a larger space between the rear portions of-the' legs 21. The same ledge 22 is provided to correspond with the ledge 14, but this ledge'is cut back as shown at 23 to provide an overhang 24 at the top of the arch opening 20.

trated my door frame construction as built into an open hearth furnace of a well recognized type. In these figures the letter A designates the walls of the furnace while B represents the top thereof. On the outside of the walls are the usual pillars C against the sides of which are disposed the channel irons D which support the edges of the roof arch E. The upper ends of the pillars are here shown as connected by stag rods F which are located above the are roof. Ordinarily the door frames or doors are nothing more than brick, arches between the pair of pillars and this brick work generally becomes damaged by the loading ma'chlne so that in time they are destroyed or at least weakened so "that they may fall in and consequently necessitate shutting down of the furnace.

In applying any form of the above descnbed door frames to this furnace, the

frame is located between two successive pillars C, the sides of the frame coming to the pillars so that brick work at this point will be unnecessary. In the forms of the device shown in Figures 4 and 5, the space between the pedestals is intended to be bricked up as indicated at G in Figure 1 while the space below the bottom of the frame is bricked up as indicated at H. The brick work G may extend up and in fact really should reach to the iron work holdmg the roof. In the form shown in Figure s 7 and 8 this top brick work may be omitted owing to the provision of the slidably mounted door.

From the foregoing description and a study of the drawings it will be apparent that the door frames constituting my invention are a manifest improvement in every respect, the pedestals at the upper ends of the frames operating to support and brace the channel irons which hold the roof. In the ordinary construction the brick arches break down and the channel lIOIlS of the roof construction then warp or sag which is likely to cause destruction of the roof itself. Furthermore the breaking down of the arches permits too great a quantity of heat to escape so that the furnace loses its efficiency and must be shut down while repairs are made. Another point of advantage'is that the frames in this case are hollow and are supplied with water which circulates therethrough and which has a coolin action which will pre vent warping and buckling of the iron.

It is to be observed that the present structure is most advantageous when compared with others and is far superior to the va rious furnaces of the well known types of construction. First, the channel holding the roof on the old type of furnacebends down under the weight and this same weight then comes upon the frames and bends them out of shape so that they can never again be fitted into place. This naturally will leave a hole which permits a draft and causes the escape and loss of gas. In the present device the weight does not bear down on the frame and as a result the frame does not become distorted but always fits properly within its place. It is often the case that the top of the furnace is raised for some reason or other which may occur in the operation or in the course of time. In such instance, an old frame cannot be used unless remodeled. This disadvantage does not occur in my construction for when the top is raised it is merely necessary to fill in the resultant opening with additional bricks.

While I have shown and described thepreferred embodiment of my invention it is of course to be understood that I reserve the tending upwardly to the horizontal beams,

and an arch of brick formation extending between the horizontal beams, each door member being formed with an arch shaped opening and provided at its top with upstanding spaced pedestals of less thickness than the body of the door member to define a horizontal ledge and to further define an opening between the pedestals, and a movably mounted door for closing the opening. In testimony whereof I affix my signature.

ANDREW GANTZ. 

